Attosecond Camera for Nanostructures (IMAGE) Ludwig-Maximilians-Universität München Caption When laser light interacts with a nanoneedle (yellow), electromagnetic near fields are formed at its surface. A second laser pulse (purple) ejects an electron (green) from the needle, which can be used to characterize the near fields. Credit Source: Christian Hackenberger Usage Restrictions The image may only be used with appropriate caption or credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.